<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区域 -->
      <div class="avatar_box">
        <img src="@/assets/logo.png" />
      </div>
      <!-- 登陆表单区域 -->
      <el-form ref="loginFormRef" class="login_form" :rules="loginFormRules" :model="loginForm">
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input
            v-model="loginForm.username"
            placeholder="请输入用户名"
            prefix-icon="iconfont icon-user"
          ></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input
            type="password"
            v-model="loginForm.password"
            placeholder="请输入密码"
            prefix-icon="iconfont icon-3702mima"
          ></el-input>
        </el-form-item>
        <!-- 按钮区域 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登陆</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 登陆表单的数据绑定对象
      loginForm: {
        username: 'admin',
        password: '123456',
      },
      // 表单的验证规则对象
      loginFormRules: {
        // 验证用户名是否合法
        username: [
          { required: true, message: "请输入用户名", trigger: "blur" },
          { min: 5, max: 12, message: "长度在 5 到 12 个字符", trigger: "blur" },
        ],
        // 验证密码是否合法
        password: [
          { required: true, message: "请输入用户密码", trigger: "blur" },
          { min: 5, max: 12, message: "长度在 5 到 12 个字符", trigger: "blur" },
        ],
      },
    };
  },
  methods:{
    resetLoginForm(){
      this.$refs.loginFormRef.resetFields()
    },
    login(){
      this.$refs.loginFormRef.validate(async valid=>{
        if(!valid) return
        const {data: res} = await this.$http.post('login',this.loginForm)
        if(res.meta.status !==200) return this.$message.error("登陆失败")
        this.$message.success("登陆成功")
        console.log(res)
        // 1 将登录成功后的token，保存到客户端的sessionStrage中
        //   1.1 项目中除了登陆之外的其他api接口，必须在登陆之后才能访问
        //   1.2 token 只能在当前网站打开期间生效，所以将token保存到sessionStorage中
        window.sessionStorage.setItem("token",res.data.token)
        // 2.通过编程式导航跳转到后台主页，路由器是/home
        this.$router.push('/home')

      });
    }
  }
};
</script>

<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
  .login_box {
    width: 450px;
    height: 300px;
    background-color: rgb(255, 255, 255);
    border-radius: 3px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    .avatar_box {
      width: 130px;
      height: 130px;
      border: solid 1px #6b6b6b;
      background-color: rgb(255, 255, 255);
      border-radius: 50%;
      position: absolute;
      transform: translate(-50%, -50%);
      left: 50%;
      padding: 10px;
      box-shadow: 0 0 10px;
      img {
        width: 100%;
        height: 100%;
        border-radius: 50%;
        background-color: rgb(199, 199, 199);
      }
    }
    .login_form {
      position: absolute;
      bottom: 0;
      width: 100%;
      padding: 0 30px;
      box-sizing: border-box;
    }
    .btns {
      display: flex;
      justify-content: flex-end;
    }
  }
}
</style>